c# 上传图片到一个外链相册服务器

private void post1(string filePath)
      {
 
          try
          {
              string fName = new FileInfo(filePath).Name;
              string url = @"https://imgbb.com/json";
              string source = fName;
              string auth_token = "ff5ee7541280debc0674220f604c8441829a7f68";//auth_token 用抓包或者浏览器F12得到。
              string timestamp = "" + ConvertDateTimeToInt(DateTime.Now);
              string fileName = fName;
 
              string action = "upload";
              string type = "file";
              byte[] fileContentByte = new byte[1024]; // 文件内容二进制
              #region 将文件转成二进制
 
              FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
              fileContentByte = new byte[fs.Length]; // 二进制文件
              fs.Read(fileContentByte, 0, Convert.ToInt32(fs.Length));
              fs.Close();
 
              #endregion
 
 
              #region 定义请求体中的内容 并转成二进制
 
              string boundary = "WebKitFormBoundaryQpiD7Zd4EUOicN44";
              string Enter = "\r\n";
 
              string modelIdStr = "--" + boundary + Enter
                      + "Content-Disposition: form-data; name=\"source\"" + Enter + Enter
                      + source + Enter;
 
              string fileContentStr = "--" + boundary + Enter
                      + "Content-Type:image/jpeg" + Enter
                      + "Content-Disposition: form-data; name=\"source\"; filename=\"" + fileName + "\"" + Enter + Enter;
 
              string updateTimeStr = Enter + "--" + boundary + Enter
                      + "Content-Disposition: form-data; name=\"timestamp\"" + Enter + Enter
                      + timestamp;
 
              string enAction = Enter + "--" + boundary + Enter
                        + "Content-Disposition: form-data; name=\"action\"" + Enter + Enter
                        + action;
 
              string enType = Enter + "--" + boundary + Enter
                        + "Content-Disposition: form-data; name=\"type\"" + Enter + Enter
                        + type;
 
              string enauth_token = Enter + "--" + boundary + Enter
                      + "Content-Disposition: form-data; name=\"encrypt\"" + Enter + Enter
                      + auth_token + Enter + "--" + boundary + "--";
              var modelIdStrByte = Encoding.UTF8.GetBytes(modelIdStr);//modelId所有字符串二进制
 
              var fileContentStrByte = Encoding.UTF8.GetBytes(fileContentStr);//fileContent一些名称等信息的二进制（不包含文件本身）
 
              var updateTimeStrByte = Encoding.UTF8.GetBytes(updateTimeStr);//updateTime所有字符串二进制
              var encryptAction = Encoding.UTF8.GetBytes(enAction);//enAction所有字符串二进制
 
              var encryptType = Encoding.UTF8.GetBytes(enType);//enType所有字符串二进制
 
              var encryptStrByte = Encoding.UTF8.GetBytes(enauth_token);//encrypt所有字符串二进制
 
 
              #endregion
 
 
              HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
              request.Method = "POST";
              request.ContentType = "multipart/form-data;boundary=" + boundary;
 
              Stream myRequestStream = request.GetRequestStream();//定义请求流
 
              #region 将各个二进制 安顺序写入请求流 modelIdStr -> (fileContentStr + fileContent) -> uodateTimeStr -> encryptStr
 
              myRequestStream.Write(modelIdStrByte, 0, modelIdStrByte.Length);
 
              myRequestStream.Write(fileContentStrByte, 0, fileContentStrByte.Length);
              myRequestStream.Write(fileContentByte, 0, fileContentByte.Length);
              myRequestStream.Write(updateTimeStrByte, 0, updateTimeStrByte.Length);
              myRequestStream.Write(encryptAction, 0, encryptAction.Length);
              myRequestStream.Write(encryptType, 0, encryptType.Length);
 
 
              myRequestStream.Write(encryptStrByte, 0, encryptStrByte.Length);
 
              #endregion
 
              HttpWebResponse response = (HttpWebResponse)request.GetResponse();//发送
 
              Stream myResponseStream = response.GetResponseStream();//获取返回值
              StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
              string retString = myStreamReader.ReadToEnd();
              myStreamReader.Close();
              myResponseStream.Close();
 
              MessageBox.Show(retString);
 
          }
          catch(Exception ex){
 
              MessageBox.Show(ex.Message);
          }
 
 
 
      }
 
 
 
 
      /// <summary> 
      /// 将c# DateTime时间格式转换为Unix时间戳格式 
      /// </summary> 
      /// <param name="time">时间</param> 
      /// <returns>long</returns> 
      public static long ConvertDateTimeToInt(System.DateTime time)
      {
          System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
          long t = (time.Ticks - startTime.Ticks) / 10000;   //除10000调整为13位     
          return t;
      }